Tire diameter

I just bought a 31 ford it came with really wide cheater slicks on it I want to swap them out for a more narrow bias ply. I was wondering if there was a way to determine the diameter of the tire by the size number or if I would be better off just calling up coker and seeing if someone can give me the info. The tires I have on now are 10.00 15 I am not sure about tread width (I can't check until monday) It has skinny 6.70 15 tires on the front and I want something similar but taller to maintain current ride height. If you can help me out it would be very helpful.

-Josh

 

Josh, I pretty sure that the tire catalogs give the diameter (inflated ride height). If I recall, if you check out Coker online, for example, they will give you that info with each tire.

 

Well don't I feel stupid thank you very much